JP5325956B2 - Vertical corrugated bulkhead structure of chemical tanker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugated bulkhead structure in which the surface area of a corrugated bulkhead can be minimized, and stiffness of the corrugated bulkhead can be increased, in a chemical tanker having a tank arrangement where the number of cargo tanks in the ship breadth direction (the number of rows of tanks) is changed in the ship length direction. <P>SOLUTION: In the chemical tanker having a tank arrangement where the number of cargo tanks in the ship breadth direction (the number of rows of tanks) is changed in the ship length direction, a weld stop part 04 is located at the optional position of a corrugated longitudinal bulkhead 1a located at the center, and a section from the weld stop part 04 to weld stop parts 01, 03 located at both ends from the weld stop part 04 is welded by using corrugated inclined bulkheads 2c, 2b. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a corrugated partition wall structure of a chemical tanker.

Conventionally, a corrugated partition wall structure of this type of chemical tanker is disclosed in Japanese Patent Application Laid-Open No. 2004-314741 already proposed by the present applicant.
FIG. 3 is a diagram (FIG. 1 of the same publication) showing an outline of the cargo partition structure of the liquid cargo-carrying ship according to the first embodiment disclosed in Japanese Patent Application Laid-Open No. 2004-314741. FORE is the bow direction, AFT is the stern direction, A to D are cargo tanks, 101 is a corrugated vertical bulkhead, 102 is a corrugated horizontal bulkhead, 111 and 112 are corrugated vertical bulkhead ends, 121 and 122 are Corrugated transverse bulkhead ends, 101a, 102a are peaks, 101b, 102b are valleys, 113, 114, 123, 124 are corrugated ends, 103, 131, 132, 133, 134 are intersections, 104 104b and 143 are access trunks.

  As shown in FIG. 3, the “liquid cargo-carrying ship corrugated bulkhead crossing structure” disclosed in Japanese Patent Application Laid-Open No. 2004-314741 is “at the intersection of the vertical and horizontal bulkheads constituting the cargo tank of the liquid cargo-carrying ship, Dispersing the corrugated partition walls at four points without concentrating them at one point reduces stress concentration acting on the intersecting parts and prevents high tensile stress from acting on the weld toes. Therefore, it is possible to prevent the cargo from leaking due to cracks, and to provide a cargo bulkhead structure for a liquid cargo-carrying ship that does not cause any line-contact between the cargos in any loading and has no restrictions on loading. In the problem (see paragraph number 0008 of the same gazette specification), “the crests and troughs of the corrugated vertical bulkhead extending from the bow side and the stern side are arranged opposite to each other, and the starboard side The crests and troughs of the corrugated transverse bulkhead extending from the port side are arranged opposite to each other, and the four corners of the access trunk structure having a rectangular cross section are joined to the ends of each crest and trough. (See the description of claim 1 of the same publication), "(1) Stress concentration at the intersection can be reduced, cargo leakage due to the occurrence of cracks at this portion can be prevented, and cargo safety is ensured. (2) Eliminates restrictions on loading, improves cargo handling efficiency, and makes it possible to load substantially more loads than before. ” (See paragraph number 0029 of the same publication).

  As described above, the “liquid cargo-carrying ship corrugated bulkhead crossing structure” disclosed in Japanese Patent Application Laid-Open No. 2004-314741 shown in FIG. 3 has one vertical and horizontal corrugated bulkhead constituting the cargo tank of the liquid cargo-carrying ship. Although there are crossing structures, there is also a liquid cargo loading ship having a tank arrangement in which the number of cargo tanks in the ship width direction (the number of tank rows) changes according to the captain method. In other words, in a liquid cargo-carrying ship with a tank arrangement in which the number of cargo tanks in the width direction of the tank (number of tank rows) varies according to the captain's method, the arrangement of the corrugated vertical bulkhead and the corrugated horizontal bulkhead at its stop is viewed from above. In some cases, a T-shaped structure (a T-shaped horizontal bar is a corrugated horizontal partition and a vertical bar is a corrugated vertical partition).

  FIG. 2 is a diagram showing an outline of a corrugated partition wall structure of a chemical tanker having a tank arrangement in which such a corrugated vertical partition wall and a corrugated horizontal partition wall arrangement at a stop portion thereof have a T-shaped structure as viewed from above. 2, FORE is the bow direction, AFT is the stern direction, No.1 Tank (p) is the port side cargo tank, No.1 Tank (S) is the starboard side cargo tank, No.1 Tank (C ) Is the central cargo tank, No. 2 Tank (P) is the port side cargo tank, No. 2 Tank (S) is the starboard side cargo tank, and reference numerals 201a, 201b, and 201c are the numbers of the respective cargo tanks. 1 Tank (p), No.1 Tank (S), No.1 Tank (C), No.2 Tank (P), No.2 Tank (S) O1, O2, and O3 are joint stop portions between the corrugated vertical barrier ribs 201a, 201b, and 201c and the corrugated horizontal barrier rib 202, respectively. The side shell 204 is the access trunk.

  As shown in FIG. 2, each of the cargo tanks No.1 Tank (p), No.1 Tank (S), and No.1 Tank (C) has three tanks arranged in the lateral direction. The tanks No. 2 Tank (P) and No. 2 Tank (S) are arranged in contact with these tanks. As is apparent from FIG. 2, the corrugated bulkhead structure of this chemical tanker is a tank arrangement structure in which the number of cargo tanks in the ship width direction (the number of tank rows) changes according to the captain method, and the number of tank rows is At the place of change, the corrugated vertical partition walls 201a, 201b, 201c are stopped and joined at the position of the corrugated horizontal partition wall 202. That is, as shown in FIG. 2, the arrangement of the corrugated vertical partition walls 201a, 201b, 201c and the corrugated horizontal partition walls 202 at the joint stop portions O1, O2, O3 is T-shaped (T-shaped horizontal bars) as viewed from above. Are corrugated horizontal barrier ribs 202, and vertical bars are corrugated vertical barrier ribs 201a, 201b, 201c).

  Normally, since the intersection of the corrugated vertical partition wall 101 and the corrugated horizontal partition wall 102 as shown in FIG. 3 is arranged in a cross shape, the cross shape cross section is constrained from four directions and cannot be freely deformed. Thus, when a load is applied to the corrugated partition walls 101 and 102 and the corrugated partition walls 101 and 102 are about to be deformed out of plane, the corrugated partition walls 101 and 102 have a function of suppressing deformation. As a result, the stress generated in the leg portions of the corrugated partition walls 101 and 102 was also suppressed to some extent.

  On the other hand, when the arrangement of the joint stop portions O1, O2, and O3 of the corrugated vertical barrier ribs 201a, 201b, and 201c and the corrugated horizontal barrier rib 202 as shown in FIG. There is a weak direction, and the rigidity is not sufficient to suppress the deformation of the corrugated partition walls 201 and 202. For this reason, it is necessary to secure a certain level of rigidity by installing an additional structure such as the access trunk 204 on the opposite side of the joint stop portion O2 or by increasing the thickness of the corrugated partition walls 201a, 201b, 201c, 202. When the plate thickness of the corrugated partition walls 201a, 201b, 201c, 202 is increased, there is a problem that the necessary steel material weight increases accordingly.

Japanese Patent Laid-Open No. 2004-314741

  In a chemical tanker with a tank arrangement in which the number of cargo tanks in the ship width direction (the number of tank rows) changes according to the captain's method, the surface area of the corrugated bulkhead can be minimized and the rigidity of the corrugated bulkhead is increased. An object of the present invention is to provide a corrugated partition wall structure that can be used.

The invention according to the claims 1, in chemical tankers with tank arrangement number of the ship width direction of the cargo tank is changed by the captain way, position the joint rest portion at an arbitrary position Tatsushiki waveform vertical barrier rib located in the center allowed, characterized by being bonded with Tatsushiki waveform swash bulkhead to the joining rest portion located at both ends from the joint rest portion.
The invention according to the claims 2, in Tatsushiki corrugation structure of chemical tanker according to claim 1, wherein the joint rest portion includes a planar view Y-shaped structure or M-shaped structure when viewed from above It is characterized by that.

Since this invention is comprised as mentioned above, there exists an effect described below.
(1) By arranging the corrugated partition wall in a Y-shape, the length of the corrugated partition wall can be shortened (surface area can be reduced), and the steel material weight required for the corrugated partition wall can be reduced. .
(2) Also, since the Y-shaped arrangement has a higher rigidity at the corrugated partition wall intersection than the conventional T-shaped arrangement, the steel material weight required for reinforcement to increase the rigidity of the intersection should be reduced. Has the effect of being able to.

FIG. 1 is a diagram showing Example 1 of a corrugated partition wall structure of a chemical tanker, which is an embodiment for implementing a corrugated partition wall structure of a chemical tanker according to the present invention; FIG. 2 is a diagram showing an outline of a corrugated partition wall structure of a chemical tanker having a tank arrangement in which the corrugated vertical partition wall and the corrugated horizontal partition wall arrangement at the end of the corrugated tank have a T-shaped structure as viewed from above. FIG. 3 is a diagram showing an outline of a cargo partition structure of the liquid cargo-loaded ship according to the first embodiment disclosed in Japanese Patent Application Laid-Open No. 2004-314741 (FIG. 1 of the same publication).

  An embodiment which is the best mode for carrying out the corrugated partition wall structure of a chemical tanker according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a view showing Example 1 of a corrugated partition wall structure of a chemical tanker, which is an embodiment for implementing a corrugated partition wall structure of a chemical tanker according to the present invention. The corrugated transverse bulkhead is shown in a diagram.

That is, in FIG. 1, the symbol FORE is the bow direction, AFT is the stern direction, No. 1 Tank (p) is the port side cargo tank, No. 1 Tank (S) is the starboard side cargo tank, No. 1 Tank (C) is the central cargo tank, No.2 Tank (P) is the port side cargo tank, No.2 Tank (S) is the starboard side cargo tank, 1a, 1b, 1c are uneven in plan view. Rippled Tatsushiki waveform vertical partition wall, 2a, 2d are Tatsushiki waveform transverse bulkhead undulating irregularities in a plan view, 2b, 2c is Tatsushiki corrugations undulating irregularities in a plan view is formed at an angle with respect to the hull longitudinal direction A corrugated slanted partition wall O4 is a new joint stop portion in the corrugated partition wall structure of the chemical tanker according to the first embodiment, and the conventional corrugated vertical partition wall 1 and the corrugated horizontal partition wall 2 are indicated by broken lines as shown in FIG. Show. As shown by the broken lines 2b and 2c in FIG. 1, conventionally, the corrugated horizontal partition wall 2 is linear, and junction stop portions O1, O2, and O3 with the corrugated vertical partition walls 1a, 1b, and 1c therebetween. It had a partition structure joined by the above.

  The corrugated partition wall structure of the chemical tanker according to the first embodiment has the corrugated oblique partition wall 2b from the arbitrary joint stop portion O4 positioned at a shorter position without joining the corrugated vertical partition wall 1a at the joint stop portion O2. As shown in FIG. 1, the corrugated vertical partition walls 1a, 1b, and 1c and their joint stop portions O4, O1, and O3 are corrugated. It is arranged in a horizontal partition (corrugated slanted partitions 2b, 2c) and is Y-shaped in plan view when viewed from above. That is, in a chemical tanker having a tank arrangement in which the number of cargo tanks in the ship width direction (the number of tank rows) changes according to the ship length method, the corrugated vertical partition wall 1a located at the center is arbitrarily short (for example, the joining angle is The joint stop portion O4 is positioned so as to be 120 degrees, and the corrugated oblique partition walls 2b and 2c are joined from the joint stop portion O4 to the positions of the joint stop portions O1 and O3.

  In the corrugated partition wall structure of the chemical tanker according to the first embodiment, the joint stop portion O4 is disposed at a short position of the corrugated vertical partition wall 1a, but this is a long position (for example, the position of the joint stop portion O5). Further, in the corrugated partition wall structure of the chemical tanker according to the first embodiment, the corrugated horizontal partition wall 2a, 2d position is not changed to the conventional corrugated horizontal partition wall position 2, and the corrugated vertical partition wall 1a Although the length is changed, it is possible to change the position of the corrugated horizontal partition walls 2a and 2d in the FORE direction or the AFT direction without changing the length of the corrugated vertical partition wall 1a from the conventional one. Is a bulkhead structure of a chemical tanker having a tank arrangement in which the number of cargo tanks (the number of tank rows) in the ship width direction changes in accordance with the ship length method, and a corrugated vertical bulkhead 1a positioned at the center and corrugated vertical bulkheads positioned at both ends thereof 1b, 1 The waveform swash bulkhead 2b between, and bonded to 2c, in which may be seen on a plane Y-shaped structure or M-shaped structure at the joint rest portion O4, O5.

In FIG. 1, the alternate long and two short dashes line indicates that the junction stop portion O5 is provided in the No. 1 Tank (C) on the extension of the corrugated vertical partition wall 1a located at the center, and the corrugated vertical partition wall positioned at both ends from the O5. 1 shows a modification in which the corrugated oblique partition walls 2b and 2c are joined between the joint stop portions O1 and O3 of 1b and 1c.
By adopting such a Y-shaped structure, the length of the conventional corrugated horizontal partition wall (corrugated horizontal partition wall shown by the broken line in FIG. 1) and the length of the missing corrugated vertical partition wall 1a (similarly, by the broken line in FIG. 1). The corrugated slanted partition walls 2b and 2c shorter than the sum of the corrugated vertical partition walls 1a) can be joined, and the overall length of the corrugated partition wall can be shortened (surface area can be reduced), which is necessary for the corrugated partition wall. Steel weight can be reduced. Further, since the Y-shaped arrangement has a higher rigidity at the corrugated partition wall intersection than the conventional T-shaped arrangement, the weight of the steel material required for reinforcement to increase the rigidity of the intersection can be reduced.

  The present invention can be used for a corrugated partition wall structure of a chemical tanker.

1a, 1b, 1c Corrugated vertical partition 2a, 2d Corrugated horizontal partition 2b, 2c Corrugated oblique partition
No.1 Tank (P), No.1 Tank (C), N0.1 Tank (S), No.2 Tank (P), No.2 Tank (S) Cargo tank 101 Corrugated bulkhead 102 Said corrugated horizontal bulkhead 101a , 102a, peaks 101b, 102b, valleys 111, 112, corrugated vertical partition walls]
121, 122 Corrugated transverse bulkhead ends 113, 114, 123, 124 Corrugated edges 103, 131, 132, 133, 134 Intersections 104, 104 b, 143 Access trunk 201, 201 a, 201 b, 201 c Corrugated bulkhead 202 Corrugated transverse bulkhead 203 Ship side skin 204 Access trunk FORE Bow direction AFT Stern direction O1, O2, O3, O4, O5 Joint stop

Claims (2)

The number of the ship width direction of the cargo tanks in chemical tankers with tank arrangement that varies captain way, brought position the joint rest portion at an arbitrary position Tatsushiki waveform vertical barrier rib positioned in the center, across from the junction rest portion Tatsushiki corrugation structure of the chemical tanker, characterized in that joined in Tatsushiki waveform swash bulkhead to the joining rest portion located. The joint rest portion is Tatsushiki corrugation structure of chemical tanker according to claim 1, characterized in that in plan view Y-shaped structure or M-shaped structure when viewed from above.

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